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IPC Main Group
C04B 28/00

Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements

Introduced: January 1985

Last revised: January 2006

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
Subclass:
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE

Filing statistics

IPC C04B 28/00 belongs to the parent subclass C04B, which recorded 267,018 patent applications worldwide between 2013 and 2023. Annual filings grew from 18,185 in 2013 to 23,514 in 2023 (+29%), peaking at 27,426 applications in 2018. The most active applicants in class C04 are CHINESE ACADEMY OF SCIENCES (2,095 applications), WUHAN UNIVERSITY OF TECHNOLOGY (1,205 applications) and NGK INSULATORS (1,133 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

BINDING(S) agents for mortar, cement or artificial stoneartificial stone from CONCRETE

8 direct subcodes

Child Classifications

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  • C04B 28/28 containing organic polyacids, e.g. polycarboxylate cements
  • C04B 28/34 containing cold phosphate binders
  • C04B 28/36 containing sulfur, sulfides or selenium

Top Applicants

Top 10 applicants by patent filingsfor class C04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 2,095
  2. WUHAN UNIVERSITY OF TECHNOLOGY 1,205
  3. NGK INSULATORS JP 1,133
  4. HALLIBURTON ENERGY SERVICES GROUP US 1,049
  5. SIKA TECHNOLOGY CH 1,041
  6. GUILIN UNIVERSITY OF TECHNOLOGY 807
  7. WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY 806
  8. SOUTHEAST UNIVERSITY 801
  9. CORNING US 777
  10. UNITED STATES GYPSUM COMPANY US 739